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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Cash and Cash Equivalents and Restricted Cash [Table Text Block] |
|  | December 31, |  |  | December 31, |  |  | December 31, |  |  | December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |  |  | 2017 |
Cash and cash equivalents |  | $ | 519,182 |  |  | $ | 249,977 |  |  | $ | 249,417 |  |  | $ | 203,104 |
Restricted cash |  |  | 15,817 |  |  |  | 20,471 |  |  |  | 23,785 |  |  |  | 24,175 |
Total cash, cash equivalents and restricted cash |  | $ | 534,999 |  |  | $ | 270,448 |  |  | $ | 273,202 |  |  | $ | 227,279 |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Beginning balance, January 1, |  | $ | 4,474 |  |  | $ | 3,607 |  |  | $ | 2,072 |
Additions due to Acquisitions |  |  | — |  |  |  | — |  |  |  | 1,425 |
Additions |  |  | 440 |  |  |  | 929 |  |  |  | 180 |
Deductions |  |  | (808 | ) |  |  | (62 | ) |  |  | (70 | )
Ending balance, December 31, |  | $ | 4,106 |  |  | $ | 4,474 |  |  | $ | 3,607 |
Property, Plant and Equipment, Useful Life [Table Text Block] |
Building and improvements | 3 through 40 years
Riverboats and barges | 5 through 40 years
Furniture and equipment | 1 through 12 years
Investments Classified by Contractual Maturity Date [Table Text Block] |
(In thousands) |  |  |  |
For the year ending December 31, |  |  |  |
2021 |  | $ | 590 |
2022 |  |  | 635 |
2023 |  |  | 680 |
2024 |  |  | 730 |
2025 |  |  | 785 |
Thereafter |  |  | 15,565 |
Total |  | $ | 18,985 |
Schedule of Changes in Self Insurance Reserves [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Beginning balance, January 1, |  | $ | 43,604 |  |  | $ | 37,501 |  |  | $ | 33,995 |
Additions |  |  |  |  |  |  |  |  |  |  |  |
Charged to costs and expenses |  |  | 105,739 |  |  |  | 121,075 |  |  |  | 90,299 |
Due to acquisitions |  |  | — |  |  |  | — |  |  |  | 3,279 |
Payments made |  |  | (103,907 | ) |  |  | (114,972 | ) |  |  | (90,072 | )
Ending balance, December 31, |  | $ | 45,436 |  |  | $ | 43,604 |  |  | $ | 37,501 |
Schedule Of Promotional Allowances [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Food & beverage |  | $ | 90,714 |  |  | $ | 215,989 |  |  | $ | 182,960 |
Rooms |  |  | 46,841 |  |  |  | 96,296 |  |  |  | 81,671 |
Other |  |  | 5,508 |  |  |  | 14,908 |  |  |  | 11,939 |

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